My Bride is a Mermaid
Seto no Hanayome, The Inland Sea Bride, 瀬戸の花嫁
While visiting his hometown, junior high school student Michishio Nagasumi’s life was changed forever when he nearly drowned. Though he was saved by a mermaid named San, there’s a catch — her family is part of a merfolk mafia, and they abide by a strict rule: If a mermaid is discovered by a man, either he or the mermaid must die.
That is, unless the man marries into the family! Faced with such a decision, Nagasumi can only oblige their customs and become a “happy” newlywed. Now, with a new school year around the corner, Nagasumi must find a way to deal with his new bride, keep her true nature a secret, and most importantly, escape inevitable death at the hands of San’s over-protective father’s gang!